Sash-pulley.



No. 837,475. PATENTED DEC. 4, 1906.

- A. JOHNSTON.

SASH PULLEY.

APPLICATION FILED PEB.9. 1906.

.ZIIiI-EE wuen fez 61 douse srarns Para @FFIC J Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed February 9, 1906. Serial No. 800,316.

To all whom it may concern.-

Be it known that I, ALLEN .JoHNsToN, of Ottumwa, Iowa, have invented a new and useful Improvement Sash-Pulleys, which invention is fully set forth in the following specification.

My invention consists of an improved wheel or pulley and the combination therewith of a hollow axle or bearing es ecially adapted thereto, and more particularly of an improved sash-pulley or the like embodying said wheel or pulley and its bearing.

The improvements constituting the invention are especially designed for sash-pulleys, though obviously they may be applied with advantage to analogous devices, such as trolley-whee s. I

The invention and the rincipal advantagesobtained thereby will be more fully explained by referenceto the accompanying drawings, in which- Figure 1 is a perspective, and Fig. 2 a sectional, view online 2 2 of Fig. 1 of the preferred embodiment of the invention. Figs. 3, 4, and 5 are sectional views, each showing another embodiment of the invention.

Referring to Figs. 1 to 4, inclusive, is

the face-plate, and 11 and 12 are the side plates, these parts together constituting the pulley-casing and support and being formed andconnected in the manner described and claimed in my United States Patent No. 694,482, dated March 4, 1902. Plate 10, stamped from sheet metal, has integral therewith flanges 13 and 14 on opposite sides of the central oblong opening 15, through which the pulley projects. 16 16, those on flange 14 being bent outwardlythrough openings 17 in side plate 12, and those on flange 13 similarly en age with side plate 11 through openings in t e latter. Each of the side plates 1s indented or pressed to form about a central 'opening 20 an in- Wardly-projecting cone-like or frusto-conical bearing part 21 and 22. These frustoconical parts meet and are riveted together at the center of the pulley-casing, a flange 23 on part 22 being bent around and tightly pressed a ainst flan e 24 on part 21, and constitute afliollow ax e upon which the pulley turns. As shown in Figs. 1 and 2, each frusto-conical part is fluted or comprises two surface zones, the transverse curvature of each being on a different center. The inner On each flange are two ears zones of the two parts form together a later ally-concave annular bearing-groove 25. shown in Fig. 3, each frusto-conical part is of a single transverse curvature, and the two form together a laterally-concave annular bearing-groove 26 of a proximately the width of the interior space 0 the casing. Asshown in Fig. 4, the fru'sto-conical parts are in transverse section straight and together form an annular bearingoove 27 of flattened- V shape and in wi th approximating that of the interior space of the casing.

v Fig. 5 illustrates apulley-casing 30, cast in one piece. A bearing-groove 31, similar to that of Figs. 1 and 2, is provided by securing frusto-conical parts 32 and 33 in openings in the sides of the casingin the manner described in myPatent No. 724,878, dated April7, 1903, wherein other ways by which the bearinggroove may be formed are also disclosed.

'As shown in all the figures of the drawings, the pulley is formed of two counterpart side members 40 41, stampedfrom sheet metal rigidly secured together by hollow rivets 42, integralwith member 40, engaging through openings in member 41. each member. bends outward, as at 43, Figs. 2, 3, and 4, and then inward, as at 44, forming together a hollow two-part closed or partly-closed hub having an inner peripheralulging bearing-surface conforming to the shape of and closely fitting the surface of its bearing-groove. The joint or split extending around the bearing-surface constitutes an opening through which. lubricant may feed to the contacting surfaces, as here'- inafterexplaind. As shown in Fi s. 2, 3, and 5, the inner eripheral bulging earing surface of the huff is convex in cross-section, whereas in Fig. 4 it is of approximately V shape. I

'The inner bulging bearing-surface ofthe hub contacting directly with the grooved peripheral surface ofthe hollow axle acts to always center the pulley upon its bearing, preventing canting of the wheel to one side or the other when the pull of the sash-cord or' the like has a tendency'to produce such cant- 3y forming the hollow axle integral with the sheet-metal side lates, as in the referred embodiment of the invention, igs. 1'-4, I avoid the labor and expense'of securing a separate axle in place. Alsoby mak- At its inner edge" to the contacting ing the axle and the bearing-surface of the hub of large diameter and of relatively large width I increase the area of the contacting portions of the surfaces and provide a lightweight and very strong device of compact dimensions capable of sustaining heavy weights and of withstanding without injury or detriment to its operation the application of great pulling power. It has also been found that lubricant applied to the inner peripheral surface of the hollow axle at or near the central joint or split. therein will gradually find its way through said joint to the contacting bearing-surfaces, keeping the latter well lubricated for a relatively len thy period. Furthermore, lubricant place within the hollow hub inassembling the parts 43 43 will feed through the o ening or split in the hub bearing-suifaces.' I ma inclose within the hub a material of fibrous nature, such as waste, which may be saturated with the lubricant.

surface.

4. In a sash-pulley or analogous device, a wheel or pulley, formed of two sheet-metal side members and havin a hollow hub provided with a bearing-sur ace bulging toward the axis of rotation.

5. In a sash-pulley or analogous device, a wheel or pulley formed of two sheet-metal side members and having integral therewith a hollow hub provided with a bearing-surface bulging toward the axis of rotation.

6. In a sash-pulley or analogous device, a wheel or pull'e formed of two side members and having a ollow hub integral with said side members, said hub having a bearing-surface bulging toward the axis of rotation.

7. In a sash-pulley or analogous device, a wheel or pulley "formed of two counte art side members and having a hollow ub formed in two parts respectively integral with said side members, said hub having a bearing surface bulging toward the axis of rotation.

8. In a sash-pulley or analogous device, a wheel or pulley formed of two counterpart side members and having a hollow hub formed in two parts respectively integral with said side members, said hub having a laterally-convex bearing-surface about its inner perlphery.

surface of the axle.

9. The combination with a casing or support the sides of which are connected by an axle having a peripherally-grooved bearingsurface, of a sheet-metal wheel or pulley having a hollow hub provided with a bearingsurface bulging toward the axis of'rotation and conforming to and directly contacting with the grooved bearing-surface of the axle.

. 10. The combination with a casing or support, the sides of which are connected by a ollow axle. having a eripherally-grooved bearing-surface, of a s eet-metal wheel or pulley having a hollow hub provided with a bearing-surface bulging toward the axis of rotation and conforming to and directly contacting with the grooved bearing-surface of the axle.

11. The combination with a casing or support the sides of which are connected by a hollow sheet-metal axle having a peripherallyooved bearing-surface, of a sheet-metal whee or pulley havinga hollow hub provided with a bearing-surface bulging toward the axis ofjrotation and conforming to and directly contacting with the grooved bearing- 12. The combination with a casing or sup port having sheet-metal sides connected by a hollow sheet-metal axle formed integral with said sides, said axle having a peripherally grooved bearing-surface, of a sheet-metal wheel or pulley having a hollow hub provided with a bearing-surface bulging toward the axis of rotation and conforming to and di- I rectly contacting with the grooved bearingsurface of the axle.

13. The combination with a casing or support having sheet-metal sides'connec'ted by a hollow sheet-metal axle formed integral with said sides, said axle having a peripherallygrooved bearing-surface, of a sheet-metal wheel or pulley, formed of two side members and having a hollow hub integral with said sidemembers, said hub having a bearingsurface bulging toward the axis of rotation and conformingto and directly contacting with the grooved bearing-surface of the axle.

14. The combination with a casing or support having sheet-metal sides connected b a ollow sheet-metal axle formed integral with said sides, said axle having a peripherallygrooved bearing-surface, of a wheel or pulley ormed of two counterpart sheet-metal side members, said wheel having a hollow hubformed in two parts res ectively integral with said side members, said hub having bear- IIO ing-surface bulging toward'the axis of rotation and conforming to and directly contacting with the grooved bearing-surface of the 15. In a sash-pulley or analogous device}, a sheet-metal wheel or pulley havin 'a hollow hub and a lubricant within said hu ada ted to feed through an opening in the wall 0 the hub to the bearing-surface of the hub.

16. In a sash-pulley or analogous device, a Wheel or pulley having a hollow hub, said Wheel and its hub being formed of two counterpart sheet-metal sides, and a lubricant Within said hub adapted to feed to the beerin -surface of the hub thr0u%h the joint or sp it between the parts which orm the hub.

ing witnesses.

ALLEN JOHNSTON.

Witnesses:

R.'W. FUNK, J. H. MGOARTX. 

